CN107192738A - A kind of detection method and device of distribution transformer winding material - Google Patents
A kind of detection method and device of distribution transformer winding material Download PDFInfo
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- CN107192738A CN107192738A CN201710591581.4A CN201710591581A CN107192738A CN 107192738 A CN107192738 A CN 107192738A CN 201710591581 A CN201710591581 A CN 201710591581A CN 107192738 A CN107192738 A CN 107192738A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
Abstract
The present invention is that, on a kind of detection method and device of distribution transformer winding material, methods described includes：Detect whether distribution transformer capacity is less than 500kVA；If capacity is less than 500kVA, distribution transformer winding is heated using pyroelectric effect method, the winding two ends temperature difference is reached design temperature；Obtain the thermoelectrical potential value when temperature difference reaches design temperature；If thermoelectrical potential value is less than or equal to the first thermoelectrical potential threshold value, it is copper to determine winding material；If thermoelectrical potential value is more than or equal to the second thermoelectrical potential threshold value, it is aluminium to determine winding material；If the thermoelectrical potential value of distribution transformer is more than the first thermoelectrical potential threshold value and is more than or equal to 500kVA less than the second thermoelectrical potential threshold value or capacity, winding material is determined using anti-algorithm of deducing.The present invention greatly improves the accuracy of detection from distribution transformer capacity and the angle of thermoelectrical potential value.
Description
Technical field
The present invention relates to power equipment wood properly test technical field, more particularly to a kind of inspection of distribution transformer winding material
Survey method and device.
Background technology
Distribution transformer is the important electric equipment for being used for transmitting AC energy in distribution system, its have wide range of applications and
Usage amount is big, and the cost in whole distribution system shared by distribution transformer is very high, and in distribution transformer shared by winding
Cost is again very high.According to winding material, distribution transformer can be divided into copper winding distribution transformer and aluminium winding distribution becomes
Depressor.Metallic copper has the advantages that fusing point is high, density is big, current-carrying capacity is big, resistivity is small compared with metallic aluminium, therefore, copper winding
Distribution transformer is more superior than aluminium winding distribution transformer performance, so, copper winding distribution transformer is than aluminium winding distribution transformer
Device is more exposed to the favor in industry.But, recent domestic metallic copper holds at high price, some bad distribution transformers
Device manufacturer replaces copper enamel-covered wire as the winding of distribution transformer to chase bigger profit using aluminium enamel-covered wire, and purchases
Buyer often to this and it is ignorant.At present, common distribution transformer winding wood properly test method has：Volume capacity is than method, title
Weight method, temperature-coefficient of electrical resistance method and x-ray method.Wherein, volume capacity method is by measuring unlike material winding distribution transformer
The basic parameters such as size, the quality of device, by compare distribution transformer fuel tank volume, transformer oil quality, device body product and
Device body density judges the material of distribution transformer winding.Weight method is the principle bigger than aluminium density according to metallic copper, for same
The distribution transformer of template number, it is aluminium winding distribution transformer that weight is relatively light, and heavier-weight is copper coiling distribution
Transformer.Temperature-coefficient of electrical resistance method is the D.C. resistance for obtaining distribution transformer winding to be measured first with the inspection of its temperature change
Survey curve and known winding material standard distribution transformer winding D.C. resistance with its temperature change standard curve, by two
Person is contrasted, according to the difference of metallic copper and aluminium in terms of temperature coefficient, by measuring winding D.C. resistance under different temperatures
Value, calculates temperature-coefficient of electrical resistance K values to judge distribution transformer on the basis of winding temperature model using the linear multi Return Law
The material of device winding.X-ray detection method is by carrying out x-ray imaging to low pressure winding and high pressure winding, to detection position
During the imaging of front, blackness is copper coiling between 0.2-1.4, and blackness is aluminium winding between 1.5-2.5；To detection position just
When face is imaged, blackness is copper coiling between 0.2-0.8, and blackness is aluminium winding between 0.9-1.6.
However, current volume capacity is than in method and weight method, for the distribution transformer of identical capacity, different manufacturers or
The distribution transformer design structure of different model differs greatly, although generally with the increase transformer oil of aluminium consumption amount
Quality, volume of fuel tank, device body product become big, and device body density diminishes, but is specific in the threshold value of material judgement, these distribution
Because model is different or producer different between transformer, not the normal volume capability value for similar distribution transformer or
Person's standard weights value, it is more not high enough to the detection accuracy of winding material than method and weight method that this results in volume capacity, easily production
Raw erroneous judgement.In temperature-coefficient of electrical resistance method, because the winding D.C. resistance value of distribution transformer is too low, low-pressure side is usually milliohm
Level, existing instrument is not accurate enough to the DC resistance measurement accuracy and control errors of low pressure winding so that cause to be directed to around
The temperature-coefficient of electrical resistance model that group temperature is set up is inaccurate.In addition, in actual engineering site, it is impossible to meet resistance temperature system
The experimental condition of number method, this method is only applicable to laboratory, is unfavorable for promoting the use of.X-ray detection method needs 24 hours in advance
Setup test material, and operating procedure is complicated, therefore the operating efficiency of X-ray detection method is low, and also this method uses inspection
Measurement equipment cost is high, can only be used in laboratory, the scope of application is small.In addition, X-ray is to the healthy unfavorable of staff,
It is unfavorable for promoting the use of.
The content of the invention
To overcome problem present in correlation technique, in a first aspect, the present invention provides a kind of distribution transformer winding material
Detection method, including：Detect whether distribution transformer capacity is less than 500kVA；If distribution transformer capacity is less than
500kVA, the winding of distribution transformer is heated using pyroelectric effect method, the temperature difference at the same winding two ends of distribution transformer is reached
Design temperature；After the temperature difference at the same winding two ends of distribution transformer reaches design temperature, obtain distribution transformer and reached in the temperature difference
To thermoelectrical potential value during design temperature；If thermoelectrical potential value is less than or equal to the first thermoelectrical potential threshold value matched with design temperature,
The winding material for determining distribution transformer is copper；If thermoelectrical potential value is more than or equal to the second thermoelectrical potential matched with design temperature
Threshold value, the winding material for determining distribution transformer is aluminium, wherein, the first thermoelectrical potential threshold value is less than the second thermoelectrical potential threshold value；If
The thermoelectrical potential value of distribution transformer is more than the first thermoelectrical potential threshold value and less than the second thermoelectrical potential threshold value, or, distribution transformer holds
Amount is more than or equal to 500kVA, and the winding material that algorithm determines distribution transformer is deduced using anti-.
Second aspect, the present invention also provides a kind of detection means of distribution transformer winding material, including：Processor, deposit
Reservoir and communication interface, processor, memory are connected with communication interface by communication bus；
Communication interface, for sending and receiving signal；
Memory, for store program codes；
Processor, the program code stored for reading in memory, and the method for performing first aspect.
The technical scheme that embodiments of the invention are provided can include the following benefits：
A kind of detection method of distribution transformer winding material, including：Whether detection distribution transformer capacity is less than
500kVA；If distribution transformer capacity is less than 500kVA, the winding of distribution transformer is heated using pyroelectric effect method, makes distribution
The temperature difference at the same winding two ends of transformer reaches design temperature；The temperature difference at the same winding two ends of distribution transformer reaches setting temperature
After degree, thermoelectrical potential value of the distribution transformer when the temperature difference reaches design temperature is obtained；If thermoelectrical potential value is less than or equal to setting
Determine the first thermoelectrical potential threshold value of Temperature Matching, the winding material for determining distribution transformer is copper；If thermoelectrical potential value is more than or waited
In the second thermoelectrical potential threshold value matched with design temperature, the winding material for determining distribution transformer is aluminium, wherein, the first thermoelectrical potential
Threshold value is less than the second thermoelectrical potential threshold value；If the thermoelectrical potential value of distribution transformer is more than the first thermoelectrical potential threshold value and less than the second heat
Threshold potential, or, distribution transformer capacity is more than or equal to 500kVA, using it is anti-deduce algorithm determine distribution transformer around
Group material.
The present invention deduces algorithm based on pyroelectric effect method with anti-, is carried from the angle of distribution transformer capacity and thermoelectrical potential value
Go out distribution transformer winding wood properly test method, the problem of single detection method restricted application can be made up, it is to avoid only adopt
With the inaccurate phenomenon of testing result caused by single detection method, it can greatly improve to distribution transformer winding wood properly test
Accuracy.Further, since not caused in the present invention to the acquisition of the elementary structure parameter of distribution transformer to distribution transformer
Damage and do not influenceed by environment temperature, and detection device is simple, therefore applied widely, testing cost of the invention is low, have
Beneficial to promoting the use of.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of the detection method of distribution transformer winding material provided in an embodiment of the present invention；
Fig. 2 determines that the flow of the winding material of distribution transformer is shown to be provided in an embodiment of the present invention using anti-algorithm of deducing
It is intended to；
Fig. 3 is the schematic flow sheet of distribution transformer load loss computational methods provided in an embodiment of the present invention；
Fig. 4 is the schematic flow sheet of distribution transformer short-circuit impedance computational methods provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of distribution transformer apparent size computational methods provided in an embodiment of the present invention；
Fig. 6 is the schematic flow sheet of distribution transformer computation method for hot provided in an embodiment of the present invention；
Fig. 7 is another winding material that distribution transformer is determined using anti-deduction algorithm provided in an embodiment of the present invention
Schematic flow sheet；
Fig. 8 is a kind of structural representation of the detection means of distribution transformer winding material provided in an embodiment of the present invention.
Symbol is represented：
900- power transformer detectings device, 901- processors, 902- memories, 903- peripheral interfaces, 904- are defeated
Enter/output subsystem, 909- power circuits, 906- communication lines, 912- operating systems, 922- power transformer detecting example to be measured
Journey.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the present invention.
The detection method of the distribution transformer winding material of the embodiment of the present invention is carried out specifically below with reference to accompanying drawing
It is bright.
Embodiment one
Referring to Fig. 1, Fig. 1 is a kind of flow of the detection method of distribution transformer winding material provided in an embodiment of the present invention
Schematic diagram.As shown in Figure 1, this method comprises the following steps：
In step S101, whether detection distribution transformer capacity is less than 500kVA.
The capacity of distribution transformer be distribution transformer fundamental performance parameter in an important parameter, general distribution becomes
The capacity of depressor can reflect the overall size size of distribution transformer, meanwhile, the capacity of distribution transformer used in some area
Size, reflects the power supply usage amount of this area.In the present invention, when the capacity of distribution transformer is less than 500kVA, distribution becomes
Depressor scale is smaller, and operator more easily can heat to distribution transformer, therefore, using pyroelectric effect method
Distribution transformer winding material is differentiated.When the capacity of distribution transformer is more than or equal to 500kVA, distribution transformer
It is larger, perform step S106：The winding material that algorithm determines distribution transformer is deduced using anti-.
In step s 102, if distribution transformer capacity is less than 500kVA, distribution transformer is heated using pyroelectric effect method
The winding of device, makes the temperature difference at the same winding two ends of distribution transformer reach design temperature.
Step S102 is the pyroelectric effect method first step, i.e.,：Distribution transformer winding is heated, makes distribution transformer same
The temperature difference at one winding two ends reaches design temperature.Specifically, design temperature can select to be more than or equal to 60 DEG C, because setting temperature
When degree is less than 60 DEG C, the temperature difference at the same winding two ends of distribution transformer winding is too small, the thermoelectrical potential obtained under the less temperature difference
Value is also smaller, is easily caused accuracy of detection reduction, therefore, and the design temperature of selection distribution transformer is more than or equal to 60 DEG C,
Be conducive to improving accuracy of detection.
After the temperature difference at the same winding two ends of distribution transformer reaches design temperature, in step s 103, obtain distribution and become
Thermoelectrical potential value of the depressor when the temperature difference reaches design temperature.
Specifically, after the temperature difference at the same winding two ends of distribution transformer reaches design temperature, stop to distribution transformer
Heated, the same winding two ends temperature difference of distribution transformer is maintained at design temperature, and distribution change is obtained using measuring instrument
Thermoelectrical potential value of the depressor under stable design temperature, the winding material of distribution transformer is determined by the size of thermoelectrical potential value
Matter.
If thermoelectrical potential value is less than or equal to the first thermoelectrical potential threshold value matched with design temperature, step S104 is performed：
The winding material for determining distribution transformer is copper.
If thermoelectrical potential value is more than or equal to the second thermoelectrical potential threshold value matched with design temperature, step S105 is performed：
The winding material for determining distribution transformer is aluminium.Wherein, the first thermoelectrical potential threshold value is less than the second thermoelectrical potential threshold value.
If the thermoelectrical potential value of distribution transformer is more than the first thermoelectrical potential threshold value and less than the second thermoelectrical potential threshold value, perform
Step S106：The winding material that algorithm determines distribution transformer is deduced using anti-.
From above step S102-S106, distribution transformer winding material is judged using pyroelectric effect method, it is main
To include heating, test and judge three processes, specifically include：Design temperature, test distribution is heated to distribution transformer to become
The thermoelectricity that the thermoelectrical potential value of depressor at a set temperature and the thermoelectrical potential value combination design temperature according to obtained by test are matched
The material of gesture value threshold decision distribution transformer winding.
Specifically, design temperature can select 60 DEG C, the first thermoelectrical potential threshold value can select 50 microamperes, the second thermoelectrical potential threshold
Value can select 120 microamperes.Criterion is：When the same winding two ends temperature difference of distribution transformer is 60 DEG C, if thermoelectrical potential value is small
In or equal to 50 microamperes, it is determined that distribution transformer winding material is copper；If thermoelectrical potential value is more than or equal to 120 microamperes,
It is aluminium to determine distribution transformer winding material；If the thermoelectrical potential value of distribution transformer is more than 50 microamperes and less than 120 microamperes,
The winding material that algorithm determines distribution transformer is deduced using anti-.
Referring to Fig. 2, Fig. 2 deduces the winding material that algorithm determines distribution transformer to be provided in an embodiment of the present invention using anti-
Schematic flow sheet.As shown in Figure 2, determine that the winding material of distribution transformer comprises the following steps using anti-algorithm of deducing：
Step S1061：Actual measurement is carried out to distribution transformer, the basic electric property energy parameter of distribution transformer is obtained.Its
In, the fundamental performance parameter of distribution transformer includes the parameter values, the basic performance of distribution transformer such as load loss, short-circuit impedance
Parameter not only includes the parameter values such as load loss, short-circuit impedance.
Step S1062：According to the basic electric property energy parameter of distribution transformer, judge whether distribution transformer meets national mark
It is accurate.
If distribution transformer meets national standard, it is the qualified distribution transformer of performance to determine distribution transformer.
Step S1061- steps S1062 adds the judgement qualified to distribution transformer performance, it is ensured that distribution transformer performance
Qualified is the most basic quality assurance of distribution transformer.Above step is added in the embodiment of the present invention, is entered to distribution transformer
Basic quality testing is first carried out before row winding wood properly test, can first be arranged from large batch of distribution transformer to be detected
Except the underproof distribution transformer of performance, so as to improve the detection efficiency that winding wood properly test is carried out to distribution transformer.
Step S1063：Assuming that the winding material of distribution transformer is copper.
Because metallic copper is different from the unit for electrical property parameters of metallic aluminium, so the winding of distribution transformer is assumed to be into copper winding
Or during aluminium winding, the design parameter difference that algorithm is calculated is deduced using anti-, this step is anti-according to using using copper winding
Algorithm is deduced to be calculated.Only enter in the present invention by taking three-phase three-column, double winding, laminar winding, oil immersion-type distribution transformer as an example
Row is calculated.
Step S1064：The structural parameters of distribution transformer iron core and winding are obtained, structural parameters include：The diameter of iron core
With the number of plies of cross sectional shape, the number of turn of winding and winding.
The diameter and cross sectional shape of iron core, the number of turn of winding and the number of plies of winding are iron core and winding in distribution transformer
Elementary structure parameter, these elementary structure parameters are using anti-to deduce the winding material that algorithm determines distribution transformer in the present invention
The call parameter of matter.
Step S1065：According to the number of plies of the diameter and cross sectional shape of iron core, the number of turn of winding and winding, calculate
Distribution transformer is assumed to be current density, load loss, short-circuit impedance, size and weight during copper winding.
Specifically, the method for calculating current density when distribution transformer is assumed to be copper winding comprises the following steps：
S10651：According to the cross sectional shape of winding conducting wire, length, width and the sectional area of wire of winding are calculated
Ax。
S10652：Utilize formulaCurrent density in wire is calculated when distribution transformer is assumed to be copper winding, its
Middle IxFor phase current, j is current density.
The method of load loss when distribution transformer is assumed to be copper winding is calculated referring to Fig. 3, Fig. 3 is the embodiment of the present invention
The schematic flow sheet of the distribution transformer load loss computational methods of offer, specifically includes following steps：
S10653：According to winding mean radius, the number of turn of winding, formula L is utilizedm=2 π RxWm, calculate wire total
It is long, wherein LmFor wire overall length, RxFor the mean radius of winding, WmThe total number of turns of winding during for maximum tap.
S10654：According to the direct current of conductor length during specified tap, sectional area of wire and design temperature lower wire
Resistance, utilizes formulaWinding D.C. resistance is calculated, wherein, RtFor the D.C. resistance of the wire at t DEG C, LNFor volume
Conductor length when tapping surely, AxFor sectional area of wire, ρtFor the resistance coefficient of the wire at t DEG C.
S10655：According to the phase current in winding D.C. resistance and winding, formula P is utilizedx=3Ig 2RtCalculate around
Group resistance loss, wherein, PxFor the resistance loss of winding, IgFor phase current, RtFor the D.C. resistance of the wire at t DEG C.
S10656：It is lost according to winding resistance, obtains winding added losses.Specifically, rule of thumb summarize and understand, capacity
Distribution transformer less than or equal to 50kVA, winding added losses are 3% that winding resistance is lost；Capacity is more than or equal to
63kVA and the distribution transformer less than or equal to 630kVA, winding added losses are 5% that winding resistance is lost.
S10657：Winding resistance loss is added with winding added losses, the load loss of distribution transformer is obtained.
The method of short-circuit impedance when distribution transformer is assumed to be copper winding is calculated referring to Fig. 4, Fig. 4 is the embodiment of the present invention
The schematic flow sheet of the distribution transformer short-circuit impedance computational methods of offer, specifically includes following steps：
S10658：According to the load loss and rated capacity of distribution transformer, formula is utilizedCalculate
Go out the short-circuit impedance resistive component of distribution transformer, wherein ukrFor short-circuit impedance resistive component, PkFor load loss, PNTo be specified
Capacity.
S10659：According to the total number of turns when frequency, rated current, principal tapping of distribution transformer, average reactance highly, often
The thickness in the empty road of circle potential, the thickness of inside and outside winding, the mean radius of inside and outside winding, leakage field and average the half of the empty road of leakage field
Footpath, utilizes formulaThe short-circuit impedance reactive component of distribution transformer is calculated, wherein, it is ukx
Short-circuit impedance reactive component, f is frequency, and I is rated current, total number of turns when W is principal tapping, etFor every circle potential, H is winding
Average reactance height, ρ is Rockwell coefficient, and K is additional reactance coefficient.
S10660：According to short-circuit impedance resistive component and short-circuit impedance reactive component, formula is utilizedMeter
Calculate the short-circuit impedance for drawing distribution transformer, wherein ukFor short-circuit impedance, ukrFor short-circuit impedance resistive component, ukxFor short-circuit impedance
Reactive component.
The size of distribution transformer in the method for calculating apparent size when distribution transformer is assumed to be copper winding, the present invention
Fuel tank height, fuel tank width and fuel tank length including distribution transformer.Therefore, calculate distribution transformer and be assumed to be copper winding
When the method for apparent size namely calculate fuel tank height, the method for fuel tank width and fuel tank length of distribution transformer,
This method is referring to Fig. 5, and Fig. 5 is the schematic flow sheet of distribution transformer apparent size computational methods provided in an embodiment of the present invention,
Specifically include following steps：
S10661：According to iron core radius, formula M is utilized0=(R1+δ3+BxD+δ4+BxG) × 2+E calculates core center
Away from, wherein, M0For the centre-to-centre spacing of two iron cores, R1For iron core radius, δ3For distance of the low pressure winding to iron core, BxDFor low pressure winding
Width is to thickness, δ4It is high-low pressure around group distance, BxGIt is high pressure winding width to thickness, E is phase spacing.
S10662：According to the diameter of wire or width of tape insulation, formula H is utilized1=b × n × (n1+ 1)+b+ δ are calculated
Winding height, wherein, H1For winding height, n1For every layer of the number of turn of distribution transformer, δ is coiling nargin.
S10663：Height, static board and the oil duct sum by static board, pressure after being compressed according to winding height, cushion block
Plate height and pressing plate utilize formula H to the pore size of upper yoke0=H1+H2+Ex+H3+δ5Calculate iron core window high, its
In, H0High, the H for iron core window1For winding total height, H2Height after being compressed for cushion block, ExFor static board and the oil by static board
Road sum, δ5For platen elevation and pressing plate to the pore size of upper yoke, H3For thickness of compressive plate.
S10664：It is high according to iron core window, utilize formula H=H0+2He+Hd+HxFuel tank height is calculated, wherein, it is H0Iron
Core window is high, HeFor the most large stretch of width of iron yoke, HdFor feet height, HxFor the distance of iron core to case lid, it can table look-up and obtain.
S10665：According to the diameter of outer winding, formula B=D is utilizedG+B1The fuel tank width of distribution transformer is calculated,
Wherein, DGFor the diameter of outer winding, B1It is high and low pressure side to fuel tank space.
S10666：According to the diameter of outer winding, iron core column centre-to-centre spacing, formula L=D is utilizedG+2M0+B2Calculate distribution
The fuel tank length of transformer, wherein, B2It is winding outside long axis direction A/C phases to fuel tank space.
The method for calculating weight when distribution transformer is assumed to be copper winding is provided referring to Fig. 6, Fig. 6 for the embodiment of the present invention
Distribution transformer computation method for hot schematic flow sheet, specifically include following steps：
S10667：According to silicon steel sheet weight and the copper conductor weight of tape insulation, formula is utilizedCalculate
Device body oil extraction weight when distribution transformer is assumed to be copper winding is drawn, wherein, GFeFor silicon steel sheet weight, GCuFor the copper of tape insulation
Wire weight.
S10668：According to fuel tank height, fuel tank cross-sectional area, formula G is utilizedky=0.9HAdCalculate distribution transformer
Empty fuel tank charge of oil weight, wherein, H be fuel tank height, AdFor fuel tank cross-sectional area.
S10669：According to device body oil extraction weight, empty fuel tank charge of oil weight, formula G is utilizedy=Gky-Gpy+GsyCalculate distribution
Total oil weight of transformer, wherein GkyFor empty fuel tank charge of oil weight, GpyFor device body oil extraction weight, GsyFor the oil weight in radiator.
S10670：According to silicon steel sheet weight and the wire weight of tape insulation, formula G is utilizedq=Kq(GFe+Gr) calculate
Go out the untanking mass of distribution transformer, wherein, GFeFor silicon steel sheet weight, GrFor the wire weight of tape insulation, KqFor device body miscellany
Coefficient, K during full copper cashqValue is 1.15, K during half half aluminium of bronze medalqValue is 1.16, K during full aluminum steelqValue is 1.2.
S10671：Formula G is utilized according to fuel tank basic parameteryx=1.15 × (7.85 × (Agδg+Adδd+IbHbδb)+Gs)
Calculate the fuel tank gross weight of distribution transformer, wherein AgFor case lid area, δgFor case lid thickness, AdFor bottom area, δdFor
Bottom thickness, IbFor fuel tank girth, HbFor fuel tank height, δbFor fuel tank wall thickness, GsFor heatsink weight.
S10672：According to device body oil extraction weight, empty fuel tank charge of oil weight, untanking mass and the weight of attachment, formula G=G is utilizedq
+Gyx+Gy+GfThe gross weight of distribution transformer is calculated, wherein, GqFor untanking mass, GyxFor fuel tank weight, GyWeighed for total oil,
GfFor the weight of attachment.
It can be calculated by above S10661-S10672 steps：Current density when distribution transformer is assumed to be copper winding,
Load loss, short-circuit impedance, size and weight.
Step S1066：Carry out actual measurement to distribution transformer, it is the load loss nominal value of acquisition distribution transformer, short
The anti-nominal value of roadlock, size nominal value and weight nominal value.
Load loss nominal value, short-circuit impedance nominal value, size nominal value and the weight nominal value of distribution transformer, can
With treat be measured piezoelectric transformer carry out unit for electrical property parameters measurement and obtain.
Step S1067：Distribution transformer is assumed to be to load loss, short-circuit impedance, size and weight during copper winding
Contrast load loss nominal value, short-circuit impedance nominal value, size nominal value and weight nominal value, judge that load loss is inclined respectively
Whether the absolute value of difference is less than load loss deviation threshold, whether the absolute value of short-circuit impedance deviation is less than short-circuit impedance deviation threshold
Whether value, the absolute value of dimensional discrepancy are less than dimensional discrepancy threshold value, whether the absolute value of deviation of weight is less than deviation of weight threshold value
And whether current density is more than current density threshold.
Specifically, circuit current density threshold can be 1.5A/mm2, load loss deviation threshold can for 5%, short circuit
Impedance deviation threshold value can be that 10%, dimensional discrepancy threshold value can be 8% and deviation of weight threshold value can be 10%.These parameters
Threshold value is the regulatory thresholds of main flow distribution transformer under the conditions of prior art, and the threshold value can relatively accurately reflect distribution transformer
The winding material of device is copper winding or aluminium winding, so as to improve the accuracy of detection method in the present invention.
Step S1068：If the absolute value of load loss deviation is less than load loss deviation threshold, short-circuit impedance deviation
Absolute value is less than short-circuit impedance deviation threshold, the absolute value of dimensional discrepancy is less than dimensional discrepancy threshold value, the absolute value of deviation of weight
It is more than current density threshold less than deviation of weight threshold value and current density, the winding material for determining distribution transformer is copper.
Specifically, if the absolute value of load loss deviation be less than the 5%, absolute value of short-circuit impedance deviation be less than 10%,
The absolute value that the absolute value of dimensional discrepancy is less than 8%, deviation of weight is less than 10% and current density is more than 1.5A/mm2, it is determined that matching somebody with somebody
The winding material of piezoelectric transformer is copper.
Embodiment two
Referring to Fig. 7 on the basis of the embodiment shown in above-mentioned Fig. 1-Fig. 6, Fig. 7 is provided in an embodiment of the present invention another
It is a kind of to deduce the schematic flow sheet that algorithm determines the winding material of distribution transformer using anti-.As shown in Figure 7, distribution transformer is determined
The winding material of device be copper after, also comprise the following steps in the embodiment of the present invention：
Step S1069：Assuming that distribution transformer winding material is aluminium.
It is different from the unit for electrical property parameters of metallic aluminium that the step is also based on metallic copper, and the winding of distribution transformer is assumed to be
During copper winding, calculated by anti-deduction algorithm and learn that winding material is not copper, continue using algorithm is instead deduced that winding material is false
Aluminium is set to, is calculated.
Step S1070：If distribution transformer is the qualified distribution transformer of performance, according to the diameter of iron core and section shape
The number of plies of shape, the number of turn of winding and winding, calculates the size and weight when distribution transformer is assumed to be aluminium winding.
Specifically, the step S10641-S10652 of the size and weight when distribution transformer is assumed to be aluminium winding is calculated
It is middle calculate when distribution transformer is assumed to be copper winding size and weight the step of it is identical, the parameter of copper winding is simply changed to aluminium
Winding parameter, for example：Utilize formulaCalculate device body oil extraction when distribution transformer is assumed to be aluminium winding
Weight, wherein, GFeFor silicon steel sheet weight, GAlFor the aluminum conductor weight of tape insulation.
Step S1071：Distribution transformer is assumed to be to load loss, short-circuit impedance, size and weight during aluminium winding
The load loss nominal value and short-circuit impedance nominal value of the fundamental performance parameter of contrast distribution transformer and actual measurement respectively
Size nominal value and weight nominal value, judge whether the absolute value of load loss deviation is less than load loss deviation threshold, short
Whether the absolute value of roadlock anti-deviation is less than short-circuit impedance deviation threshold, whether the absolute value of dimensional discrepancy is less than dimensional discrepancy threshold
Value, the absolute value of deviation of weight whether are less than deviation of weight threshold value and whether the current density is less than current density threshold.
Step S1072：If the absolute value of load loss deviation is less than load loss deviation threshold, short-circuit impedance deviation
Absolute value is less than short-circuit impedance deviation threshold, the absolute value of dimensional discrepancy is less than dimensional discrepancy threshold value, the absolute value of deviation of weight
It is more than current density threshold less than deviation of weight threshold value and current density, the winding material for determining distribution transformer is aluminium.Otherwise
The winding material for determining distribution transformer is not aluminium.
The part that the embodiment is not described in detail can refer between the embodiment shown in Fig. 1-Fig. 6, three can mutual coherent
According to no longer elaborating herein.
Referring to Fig. 8, a kind of structural representation for power transformer detecting device that Fig. 8 provides for the embodiment of the present application.Such as
Shown in Fig. 8, the device 900 may include：At least one processor 901, internal memory 902, peripheral interface 903, input/output
System 904, power circuit 909 and communication line 906.
Internal memory 902 may include operating system 912 and power transformer detecting routine 922.For example, internal memory 902 may include height
Fast random access memory (high-speed random access memory), disk, static RAM
(SPAM), dynamic random access memory (DRAM), read-only storage (ROM), flash memory or non-voltile memory.Internal memory 902 can
Store the program coding for operating system 912 and power transformer detecting routine 922, that is to say, that may include distribution transformer
Software module, instruction set architecture needed for the action of detection means 900 or a variety of data outside it.Now, processor 901 or
The access of other controllers of the grade of peripheral interface 903 and internal memory 902 can be controlled by processor 901.
Peripheral interface 903 can be by the input of power transformer detecting device 900 and/or output ancillary equipment and processing
Device 901 and internal memory 902 are combined.Also, input/output subsystem 904 can set a variety of input/output ancillary equipment with periphery
Standby interface 903 is combined.For example, input/output subsystem 904 may include display, keyboard, mouse or be used to incite somebody to action as needed
The controller that the ancillary equipment such as ammeter, various sensors are combined with peripheral interface 903.Specifically, in input/output
Subsystem 904 includes the controller for being used to power transformer detecting circuit being combined with peripheral interface 903.
Power circuit 909 can to the circuit element of power transformer detecting circuit all or part of supply electric power.For example,
Power circuit 909 may include such as electric power management system, the more than one power supply of battery or exchange (AC), charging system or be used for
Electric power generation, management, other any circuit elements of distribution.
Communication line 906 can be communicated using at least one interface with other main frames.
The software module or instruction set architecture that processor 901 is stored in internal memory 902 by implementing can perform distribution transformer
The a variety of functions and processing data of device detection means 900.That is, the arithmetic basic by performing of processor 901, logic with
And the input/output calculation of computer system, it may be configured as handling the order of computer program.
Processor 901 is structured to the method for performing the power transformer detecting in above-described embodiment.
Fig. 8 embodiment is only an example of power transformer detecting device 900, power transformer detecting device 900
Can have following structure or configuration：The partial circuit element shown in Fig. 8 is omitted, or is further equipped with not shown in Fig. 8 and adds
Circuit element, or combine even more than a circuit element.For example：The electricity that can be included in power transformer detecting device 900
Circuit component can be by the software for the integrated circuit becomed privileged including more than one signal transacting or application program, hardware or soft
The combination of both part and hardware and realize.
A kind of power transformer detecting device that the embodiment of the present application is provided, using intelligentized processor, with distribution
Transformer device detects the memory of routine, with reference to input/output subsystem and peripheral interface, power circuit, order wire
Road, can exactly realize and treat the quality testing for being measured piezoelectric transformer.
Those skilled in the art will readily occur to its of the present invention after the disclosure that specification and practice are invented here is considered
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (8)
1. a kind of detection method of distribution transformer winding material, it is characterised in that including：
Detect whether distribution transformer capacity is less than 500kVA；
If the distribution transformer capacity is less than 500kVA, the winding of the distribution transformer is heated using pyroelectric effect method,
The temperature difference at the same winding two ends of the distribution transformer is set to reach design temperature；
After the temperature difference at the same winding two ends of the distribution transformer reaches design temperature, the distribution transformer is obtained described
The temperature difference reaches thermoelectrical potential value during design temperature；
If the thermoelectrical potential value is less than or equal to the first thermoelectrical potential threshold value matched with the design temperature, the distribution is determined
The winding material of transformer is copper；
If the thermoelectrical potential value is more than or equal to the second thermoelectrical potential threshold value matched with the design temperature, the distribution is determined
The winding material of transformer is aluminium, wherein, the first thermoelectrical potential threshold value is less than the second thermoelectrical potential threshold value；
If the thermoelectrical potential value of the distribution transformer is more than the first thermoelectrical potential threshold value and less than the second thermoelectrical potential threshold
Value, or, the distribution transformer capacity is more than or equal to 500kVA, and the distribution transformer is determined using anti-algorithm of deducing
Winding material.
2. the detection method of distribution transformer winding material according to claim 1, it is characterised in that described to be pushed away using counter
Algorithm determines the winding material of the distribution transformer, including：
Actual measurement is carried out to the distribution transformer, the basic electric property energy parameter of the distribution transformer is obtained；
According to the basic electric property energy parameter of the distribution transformer, judge whether the distribution transformer meets national standard；
If the distribution transformer meets national standard, it assumes that the winding material of the distribution transformer is copper；
The structural parameters of the distribution transformer iron core and winding are obtained, the structural parameters include：The diameter of the iron core and
The number of plies of cross sectional shape, the number of turn of the winding and the winding；
According to the wire of the diameter and cross sectional shape of the iron core, the number of turn of the winding, the number of plies of the winding and winding
Specification, calculate current density when the distribution transformer is assumed to be copper winding, load loss, short-circuit impedance, size with
And weight；
Actual measurement is carried out to the distribution transformer, the size nominal value and weight for measuring the distribution transformer are nominal
Value；
Load loss, short-circuit impedance, size and weight when the distribution transformer is assumed to be into copper winding contrast institute respectively
State the load loss nominal value and short-circuit impedance nominal value of the fundamental performance parameter of distribution transformer and the size of actual measurement
Nominal value and weight nominal value, judge whether the absolute value of load loss deviation is less than load loss deviation threshold, short-circuit impedance
Whether the absolute value of deviation is less than short-circuit impedance deviation threshold, whether the absolute value of dimensional discrepancy is less than dimensional discrepancy threshold value, again
The absolute value of amount deviation whether is less than deviation of weight threshold value and whether the current density is more than current density threshold；
If the absolute value of the load loss deviation is less than load loss deviation threshold, the absolute value of the short-circuit impedance deviation
Less than short-circuit impedance deviation threshold, the dimensional discrepancy absolute value be less than dimensional discrepancy threshold value, the deviation of weight it is absolute
Value is less than deviation of weight threshold value and the current density is more than current density threshold, determines the winding material of the distribution transformer
For copper.
3. the detection method of distribution transformer winding material according to claim 2, it is characterised in that determine the distribution
The winding material of transformer is for after copper, methods described also includes：
Assuming that the distribution transformer winding material is aluminium；
According to the diameter and cross sectional shape of the iron core, the number of turn of the winding, the number of plies of the winding, described match somebody with somebody is calculated
Piezoelectric transformer is assumed to be size and weight during aluminium winding；
Load loss, short-circuit impedance, size and weight when the distribution transformer is assumed to be into aluminium winding contrast institute respectively
State the load loss nominal value and short-circuit impedance nominal value of the fundamental performance parameter of distribution transformer and the size of actual measurement
Nominal value and weight nominal value, judge whether the absolute value of load loss deviation is less than load loss deviation threshold, short-circuit impedance
Whether the absolute value of deviation is less than short-circuit impedance deviation threshold, whether the absolute value of dimensional discrepancy is less than dimensional discrepancy threshold value, again
The absolute value of amount deviation whether is less than deviation of weight threshold value and whether the current density is more than current density threshold；
If the absolute value of the load loss deviation is less than load loss deviation threshold, the absolute value of the short-circuit impedance deviation
Less than short-circuit impedance deviation threshold, the dimensional discrepancy absolute value be less than dimensional discrepancy threshold value, the deviation of weight it is absolute
Value is less than deviation of weight threshold value and the current density is less than current density threshold, determines the winding material of the distribution transformer
For aluminium.
4. the detection method of distribution transformer winding material according to claim 1, it is characterised in that the design temperature
More than or equal to 60 DEG C.
5. the detection method of distribution transformer winding material according to claim 1, it is characterised in that the design temperature
For 60 DEG C, the first thermoelectrical potential threshold value is 50 microamperes, and the second thermoelectrical potential threshold value is 120 microamperes.
6. the detection method of distribution transformer winding material according to claim 2, it is characterised in that the circuit current
Density threshold is 1.5A/mm2, the load loss deviation threshold be 5%, the short-circuit impedance deviation threshold be 10%, it is described
Dimensional discrepancy threshold value is 8% and the deviation of weight threshold value is 10%.
7. the detection method of distribution transformer winding material according to claim 2, it is characterised in that the distribution transformer
The size of device includes fuel tank height, fuel tank width and the fuel tank length of the distribution transformer；
Whether judge the absolute value of the size and nominal size deviation includes less than dimensional discrepancy threshold value：
Judge whether the fuel tank height of the distribution transformer is less than fuel tank with the absolute value of nominal fuel tank height tolerance highly inclined
The absolute value of poor threshold value, fuel tank width and nominal fuel tank width difference whether be less than fuel tank width difference threshold value and fuel tank length with
Whether the absolute value of nominal fuel tank length variation is less than fuel tank length variation threshold value.
8. a kind of detection means of distribution transformer winding material, it is characterised in that described device includes：Processor, memory
And communication interface, the processor, memory are connected with communication interface by communication bus；
The communication interface, for sending and receiving signal；
The memory, for store program codes；
The processor, for reading the program code stored in the memory, and is performed as any in claim 1 to 7
Method described in.
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| CN108398458A (en) * | 2018-03-09 | 2018-08-14 | 广州供电局有限公司 | A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method |
| CN108593706A (en) * | 2018-05-18 | 2018-09-28 | 国网重庆市电力公司电力科学研究院 | A kind of both ends heating distribution transformer winding material nondestructive detection system |
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| CN109164322A (en) * | 2018-09-21 | 2019-01-08 | 国网辽宁省电力有限公司铁岭供电公司 | Dry-type distribution transformer winding coil material determination method and analytical equipment |
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| CN108267489A (en) * | 2017-12-26 | 2018-07-10 | 华侨大学 | The judgment method of dry change winding material based on metal material temperature-coefficient of electrical resistance |
| CN108267489B (en) * | 2017-12-26 | 2020-09-04 | 华侨大学 | Method for judging material quality of dry-variable winding based on resistance temperature coefficient of metal material |
| CN108398458A (en) * | 2018-03-09 | 2018-08-14 | 广州供电局有限公司 | A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method |
| CN108169275A (en) * | 2018-03-09 | 2018-06-15 | 广州供电局有限公司 | A kind of reactance coil material thermoelectricity Curves Recognition method |
| CN108593706A (en) * | 2018-05-18 | 2018-09-28 | 国网重庆市电力公司电力科学研究院 | A kind of both ends heating distribution transformer winding material nondestructive detection system |
| CN108680598A (en) * | 2018-05-18 | 2018-10-19 | 国网重庆市电力公司电力科学研究院 | A kind of both ends heating distribution transformer winding material lossless detection method |
| CN109164322A (en) * | 2018-09-21 | 2019-01-08 | 国网辽宁省电力有限公司铁岭供电公司 | Dry-type distribution transformer winding coil material determination method and analytical equipment |
| CN109612422A (en) * | 2018-12-18 | 2019-04-12 | 吴江变压器有限公司 | A kind of the actual average area of section and measurement of length method of transformer conducting wire |
| CN109612422B (en) * | 2018-12-18 | 2020-11-24 | 吴江变压器有限公司 | Method for measuring actual average cross-sectional area and length of transformer wire |
| CN109800492B (en) * | 2019-01-07 | 2022-02-01 | 广东电网有限责任公司广州供电局 | Material detection method and device for transformer winding and computer equipment |
| CN109800492A (en) * | 2019-01-07 | 2019-05-24 | 广州供电局有限公司 | The material tests method, apparatus and computer equipment of transformer winding |
| CN111326335A (en) * | 2020-03-06 | 2020-06-23 | 海南金盘智能科技股份有限公司 | Method and device for determining double-winding electromagnetic scheme of transformer |
| CN115389833A (en) * | 2022-07-25 | 2022-11-25 | 云南电网有限责任公司楚雄供电局 | Automatic capacity checking method for 315kV and below voltage class distribution transformer |
| CN115389833B (en) * | 2022-07-25 | 2024-02-20 | 云南电网有限责任公司楚雄供电局 | Automatic capacity checking method for distribution transformer with voltage class of 315kV and below |
| CN115598166A (en) * | 2022-10-09 | 2023-01-13 | 国网山东省电力公司临沂供电公司（Cn） | Rapid nondestructive transformer coil material detection method |
| CN115598166B (en) * | 2022-10-09 | 2023-10-13 | 国网山东省电力公司临沂供电公司 | Rapid nondestructive detection method for material of transformer coil |
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